:root{--bg:#f4f4f1;--paper:#fff;--ink:#161816;--muted:#646963;--line:#d8dad5;--dark:#171a18;--soft:#ebece8;--accent:#8a6a3d;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,Arial,"Helvetica Neue",sans-serif;line-height:1.58;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.wrap{width:min(calc(100% - 48px),var(--max));margin:0 auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(244,244,241,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.header-row{height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:14px;min-width:max-content}.brand-logo{width:150px;height:auto;display:block}.brand-divider{width:1px;height:28px;background:#b7bbb5}.brand-hlpro{font-size:18px;font-weight:800;letter-spacing:.08em}.nav{display:flex;align-items:center;gap:24px;font-size:14px}.nav a{color:#414640}.nav a:hover,.nav a.active{color:#000}.nav .shop-link{font-weight:750;border-left:1px solid var(--line);padding-left:24px}.menu-btn{display:none;border:1px solid var(--line);background:var(--paper);padding:9px 12px;border-radius:8px;font-weight:700}.hero{padding:96px 0 76px}.eyebrow,.kicker{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#777d77;font-weight:750}.hero h1,.page-hero h1{font-size:clamp(44px,6.5vw,82px);line-height:1.01;letter-spacing:-.05em;margin:14px 0 24px;max-width:1020px}.hero .lead{font-size:21px;line-height:1.55;color:var(--muted);max-width:780px;margin:0}.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:70px;align-items:end}.mission{border-top:2px solid var(--ink);padding-top:20px}.mission strong{display:block;font-size:13px;margin-bottom:9px}.mission p{margin:0;color:#414640;font-size:16px}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:12px 16px;font-size:13px;font-weight:800;border:1px solid var(--line);background:var(--paper);color:var(--ink)}.btn-primary{background:var(--dark);border-color:var(--dark);color:#fff}.btn:hover{transform:translateY(-1px)}.section{padding:76px 0}.section-sm{padding:48px 0}.section-line{border-top:1px solid var(--line)}.section-head{display:grid;grid-template-columns:300px 1fr;gap:60px;margin-bottom:38px}.section-head h2{font-size:42px;line-height:1.08;letter-spacing:-.035em;margin:0}.section-head p{margin:4px 0 0;color:var(--muted);font-size:17px;max-width:720px}.process{display:grid;grid-template-columns:repeat(8,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line);background:var(--paper)}.process-item{min-height:154px;padding:18px 15px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.process-item span{display:block;font-size:11px;color:#8a8e89;margin-bottom:24px}.process-item strong{font-size:14px;line-height:1.35;display:block}.editorial-list{border-top:1px solid var(--line)}.editorial-row{display:grid;grid-template-columns:70px 260px 1fr 110px;gap:24px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line)}.editorial-row .num{font-size:12px;color:#8a8e89}.editorial-row h3{font-size:25px;margin:0;letter-spacing:-.02em}.editorial-row p{margin:0;color:var(--muted);max-width:690px}.editorial-row b{font-size:13px;text-align:right}.feature{background:var(--dark);color:#fff;border-radius:18px;padding:48px;display:grid;grid-template-columns:1fr 360px;gap:60px;align-items:center}.feature h2{font-size:44px;line-height:1.06;letter-spacing:-.035em;margin:8px 0 15px}.feature p{color:#c1c6c1;font-size:17px;max-width:700px}.feature .kicker{color:#929892}.feature-chain{display:grid;gap:9px}.feature-chain span{border:1px solid #393e3a;border-radius:8px;padding:11px 13px;font-size:13px;font-weight:700}.page-hero{padding:70px 0 52px;border-bottom:1px solid var(--line)}.breadcrumbs{font-size:12px;color:#7b807a;margin-bottom:22px}.page-hero h1{font-size:clamp(42px,6vw,70px);max-width:980px}.page-hero p{font-size:19px;color:var(--muted);max-width:800px;margin:0}.content-grid{display:grid;grid-template-columns:260px minmax(0,820px);gap:64px;align-items:start;justify-content:center}.toc{position:sticky;top:104px;font-size:13px}.toc strong{display:block;margin-bottom:12px}.toc a{display:block;padding:6px 0 6px 12px;border-left:1px solid var(--line);color:#777c77}.toc a:hover{color:var(--ink);border-left-color:var(--ink)}.article h2{font-size:36px;line-height:1.14;letter-spacing:-.03em;margin:58px 0 18px}.article h2:first-child{margin-top:0}.article h3{font-size:24px;line-height:1.25;margin:34px 0 12px}.article p,.article li{font-size:17px;color:#343934}.article .lead{font-size:22px;line-height:1.5;color:#262a26}.article ul,.article ol{padding-left:24px}.article li+li{margin-top:7px}.note{border-left:3px solid var(--accent);background:#ece8df;padding:20px 22px;margin:28px 0}.formula{background:var(--dark);color:#fff;border-radius:10px;padding:20px 22px;margin:22px 0;font-size:18px;font-weight:750;line-height:1.5}.formula.cycle{font-size:23px;letter-spacing:.01em}.divider{height:1px;background:var(--line);margin:72px 0}.route{border-top:1px solid var(--line)}.route-item{display:grid;grid-template-columns:62px 280px 1fr;gap:24px;padding:25px 0;border-bottom:1px solid var(--line)}.route-item .n{font-size:12px;color:#8a8e89;padding-top:5px}.route-item h2{font-size:24px;margin:0}.route-item p{margin:0;color:var(--muted)}.route-item.highlight{background:#eceee9;margin:0 -24px;padding-left:24px;padding-right:24px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}.panel{background:var(--paper);border:1px solid var(--line);padding:30px;border-radius:12px}.panel .label{font-size:11px;letter-spacing:.11em;text-transform:uppercase;color:#7e837e}.panel h2,.panel h3{margin:8px 0 10px;letter-spacing:-.025em}.panel h2{font-size:32px}.panel h3{font-size:24px}.panel p{color:var(--muted);margin:0 0 16px}.panel-nav{display:flex;flex-direction:column;min-height:100%;transition:background .16s ease,border-color .16s ease,transform .16s ease}.panel-nav:hover{background:#fafaf8;border-color:#bfc3bd;transform:translateY(-1px)}.panel-nav:focus-visible{outline:2px solid var(--ink);outline-offset:3px}.panel-nav-link{display:block;margin-top:auto;padding-top:8px;font-size:13px;font-weight:800;color:var(--ink)}.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:25px 0}.spec{background:var(--paper);border:1px solid var(--line);padding:18px}.spec strong{display:block;font-size:24px}.spec span{font-size:12px;color:var(--muted)}.diagnostic{border-top:1px solid var(--line)}.diagnostic-item{padding:34px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:240px 1fr;gap:50px}.diagnostic-item h2{font-size:26px;margin:0}.diagnostic-item h3{font-size:15px;margin:18px 0 6px}.diagnostic-item p,.diagnostic-item li{color:#4f544f}.diagnostic-item ul{padding-left:20px}.case{border-top:1px solid var(--line);padding:34px 0;display:grid;grid-template-columns:240px 1fr;gap:50px}.case h2{margin:0;font-size:26px}.case p{color:#4f544f}.case .cycle-inline{font-size:21px;font-weight:800;margin:12px 0}.resource-list{border-top:1px solid var(--line)}.resource{display:grid;grid-template-columns:70px 1fr auto;gap:25px;align-items:center;padding:24px 0;border-bottom:1px solid var(--line)}.resource span{font-size:11px;color:#858a85}.resource h2{font-size:22px;margin:0 0 4px}.resource p{margin:0;color:var(--muted);font-size:14px}.resource b{font-size:13px}.footer{background:var(--dark);color:#d0d4d0;margin-top:80px;padding:48px 0 30px}.footer-top{display:flex;justify-content:space-between;gap:40px;align-items:flex-start}.footer-brand{display:flex;align-items:center;gap:14px}.footer .brand-logo{filter:invert(1);width:140px}.footer .brand-divider{background:#505650}.footer .brand-hlpro{color:#fff}.footer-links{display:flex;gap:18px;flex-wrap:wrap;justify-content:flex-end}.footer-links a{font-size:13px;color:#c6cbc6}.footer-note{border-top:1px solid #363b37;margin-top:32px;padding-top:20px;display:flex;justify-content:space-between;gap:30px;font-size:12px;color:#858b86}.muted{color:var(--muted)}
@media(max-width:1050px){.nav{display:none}.menu-btn{display:block}.nav.open{display:flex;position:absolute;top:68px;left:20px;right:20px;flex-direction:column;align-items:stretch;background:var(--paper);border:1px solid var(--line);padding:18px;border-radius:10px}.nav .shop-link{border-left:0;padding-left:0}.hero-grid,.section-head,.feature,.content-grid{grid-template-columns:1fr}.mission{max-width:700px}.process{grid-template-columns:repeat(4,1fr)}.toc{display:none}.route-item{grid-template-columns:50px 240px 1fr}.two-col{grid-template-columns:1fr}.footer-top{flex-direction:column}.footer-links{justify-content:flex-start}}
@media(max-width:720px){.wrap{width:min(calc(100% - 28px),var(--max))}.header-row{height:68px}.brand-logo{width:118px}.brand-divider{height:24px}.brand-hlpro{font-size:15px}.hero{padding:64px 0 54px}.hero h1{font-size:46px}.hero .lead{font-size:18px}.section{padding:58px 0}.section-head h2{font-size:34px}.process{grid-template-columns:repeat(2,1fr)}.editorial-row{grid-template-columns:42px 1fr}.editorial-row p,.editorial-row b{grid-column:2}.editorial-row b{text-align:left}.feature{padding:30px}.feature h2{font-size:36px}.route-item,.diagnostic-item,.case{grid-template-columns:1fr;gap:9px}.route-item{padding:22px 0}.route-item .n{padding:0}.route-item.highlight{margin:0 -12px;padding-left:12px;padding-right:12px}.spec-grid{grid-template-columns:1fr}.resource{grid-template-columns:48px 1fr}.resource b{grid-column:2}.footer-note{flex-direction:column}}


/* Article context and technology navigation */
.article-context-mobile{display:none}
.article-sidebar{max-height:calc(100vh - 122px);overflow:auto;padding-right:10px;scrollbar-width:thin}
.toc-current{padding:0 0 18px;margin-bottom:18px;border-bottom:1px solid var(--line)}
.toc-step,.toc-label{display:block;font-size:10px;line-height:1.35;letter-spacing:.11em;text-transform:uppercase;color:#858a85;font-weight:800}
.toc-title{display:block;font-size:18px;line-height:1.25;margin:7px 0 10px;color:var(--ink)}
.toc-all{font-size:12px!important;padding:0!important;border:0!important;color:#555b55!important}
.toc-all:hover{color:#000!important}
.toc-block+.toc-block{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
.toc-label{margin-bottom:8px}
.toc-sections a.active{color:var(--ink);border-left:2px solid var(--ink);font-weight:700}
.toc-stage{display:grid!important;grid-template-columns:25px 1fr;gap:7px;align-items:start;padding:5px 6px!important;border-left:0!important;border-radius:6px;color:#747974!important}
.toc-stage span{font-size:10px;color:#9a9e99;padding-top:2px}
.toc-stage b{font-size:11px;line-height:1.3;font-weight:650}
.toc-stage:hover{background:#ebece8;color:var(--ink)!important}
.toc-stage.related{color:#4f554f!important}
.toc-stage.current{background:var(--dark);color:#fff!important}
.toc-stage.current span{color:#aeb4ae}
.article h2[id],.article h3[id],.route-item[id]{scroll-margin-top:108px}
.article-pager{grid-column:2;display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:stretch;margin-top:56px;padding-top:28px;border-top:1px solid var(--line)}
.article-pager-card{display:flex;flex-direction:column;justify-content:center;min-height:96px;padding:18px 20px;border:1px solid var(--line);border-radius:10px;background:var(--paper)}
.article-pager-card span{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#7d827d;margin-bottom:6px}
.article-pager-card strong{font-size:17px;line-height:1.3}
.article-pager-card.next{text-align:right}
.article-pager-card:hover{border-color:#a8ada8;transform:translateY(-1px)}
.article-pager-all{align-self:center;padding:11px 13px;font-size:12px;font-weight:750;border-radius:8px;border:1px solid var(--line);background:var(--bg);white-space:nowrap}
.process-item{transition:background .15s ease,transform .15s ease}
a.process-item:hover{background:#eceee9;transform:translateY(-2px)}
@media(max-width:1050px){
  .article-context-mobile{display:block;position:sticky;top:68px;z-index:42;background:rgba(244,244,241,.97);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .article-context-mobile-inner{min-height:54px;display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:8px;padding-bottom:8px}
  .article-context-mobile-inner>div{display:flex;flex-direction:column;min-width:0}
  .article-context-step{font-size:9px;text-transform:uppercase;letter-spacing:.09em;color:#858a85;font-weight:800}
  .article-context-mobile strong{font-size:13px;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .article-context-mobile a{font-size:11px;font-weight:750;white-space:nowrap}
  .article-pager{grid-column:1;grid-template-columns:1fr 1fr}
  .article-pager-all{grid-column:1 / -1;grid-row:2;text-align:center;justify-self:center}
  .article h2[id],.article h3[id],.route-item[id]{scroll-margin-top:142px}
}
@media(max-width:720px){
  .article-pager{grid-template-columns:1fr}
  .article-pager-all{grid-column:1;grid-row:auto;order:2}
  .article-pager-card.next{order:3;text-align:left}
}

@media (min-width:721px) and (max-width:1050px){.article-context-mobile{top:78px}}

/* Context reading drawer: open explanatory articles without losing the reading position. */
.context-link{position:relative}
.context-link.context-link-marked::after{content:"  ·  справка";font-size:.72em;font-weight:700;color:#7b817b;white-space:nowrap}
.btn.context-link.context-link-marked::after{content:"  +";font-size:1em;color:inherit}
.context-drawer-backdrop{position:fixed;inset:0;z-index:90;background:rgba(16,18,16,.38);opacity:0;pointer-events:none;transition:opacity .18s ease}
.context-drawer{position:fixed;top:0;right:0;bottom:0;z-index:91;width:min(760px,56vw);background:var(--paper);box-shadow:-18px 0 56px rgba(0,0,0,.16);transform:translateX(102%);transition:transform .22s ease;display:flex;flex-direction:column}
.context-drawer-open .context-drawer-backdrop{opacity:1;pointer-events:auto}
.context-drawer-open .context-drawer{transform:translateX(0)}
html.context-drawer-open,html.context-drawer-open body{overflow:hidden}
.context-drawer-head{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;min-height:76px;padding:12px 20px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.97);position:relative;z-index:2}
.context-drawer-back,.context-drawer-close{appearance:none;border:1px solid var(--line);background:var(--bg);border-radius:8px;min-height:40px;padding:0 12px;color:var(--ink);font:inherit;font-size:13px;font-weight:750;cursor:pointer}
.context-drawer-back[hidden]{visibility:hidden;display:block}
.context-drawer-title-wrap{min-width:0}
.context-drawer-label{display:block;font-size:10px;line-height:1.2;letter-spacing:.11em;text-transform:uppercase;color:#858a85;font-weight:800;margin-bottom:3px}
.context-drawer-title{display:block;font-size:17px;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.context-drawer-scroll{overflow:auto;overscroll-behavior:contain;flex:1;scrollbar-width:thin}
.context-drawer-inner{padding:34px 42px 64px;max-width:760px;margin:0 auto}
.context-drawer-tools{display:flex;justify-content:flex-end;margin-bottom:28px}
.context-drawer-full{font-size:12px;font-weight:750;color:#555b55;border-bottom:1px solid #aeb3ae;padding-bottom:2px}
.context-drawer-body.article h2{font-size:30px;margin-top:48px}
.context-drawer-body.article h2:first-child{margin-top:0}
.context-drawer-body.article h3{font-size:21px}
.context-drawer-body.article p,.context-drawer-body.article li{font-size:16px}
.context-drawer-body.article .lead{font-size:19px}
.context-drawer-body .formula{font-size:16px}
.context-drawer-body .formula.cycle{font-size:20px}
.context-drawer-body .btn{margin-top:4px}
.context-drawer-body a:not(.btn){text-decoration:underline;text-decoration-color:#b7bbb7;text-underline-offset:3px}
.context-drawer-body a:hover{text-decoration-color:var(--ink)}
.context-drawer-loading{padding:70px 42px;color:var(--muted);font-size:15px}
@media(max-width:1050px){.context-drawer{width:min(680px,82vw)}}
@media(max-width:720px){
  .context-drawer{width:100vw}
  .context-drawer-head{grid-template-columns:auto 1fr auto;min-height:68px;padding:10px 12px;gap:8px}
  .context-drawer-back,.context-drawer-close{min-height:38px;padding:0 10px;font-size:12px}
  .context-drawer-title{font-size:14px}
  .context-drawer-inner{padding:26px 18px 54px}
  .context-drawer-body.article h2{font-size:27px}
  .context-drawer-body.article p,.context-drawer-body.article li{font-size:16px}
  .context-link.context-link-marked::after{content:"  +"}
}

/* Manufacturer product photos */
.manufacturer-figure{margin:24px 0 12px;border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.manufacturer-figure a{display:block;background:#fff}
.manufacturer-figure img{display:block;width:100%;height:auto;object-fit:contain;background:#fff}
.manufacturer-figure figcaption{padding:10px 14px 12px;border-top:1px solid var(--line);font-size:12px;line-height:1.45;color:var(--muted)}
.manufacturer-figure-wide img{max-height:440px;object-fit:contain;padding:18px;box-sizing:border-box}
.manufacturer-gallery{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0 26px}
.manufacturer-gallery .manufacturer-figure{margin:0}
.manufacturer-gallery img{height:300px;object-fit:contain;padding:14px;box-sizing:border-box}
@media(max-width:720px){.manufacturer-gallery{grid-template-columns:1fr}.manufacturer-gallery img{height:auto}.manufacturer-figure-wide img{padding:10px}}


/* Casting tree and defect diagnostics */
.checklist{list-style:none;padding-left:0!important}.checklist li{position:relative;padding-left:30px;margin:11px 0}.checklist li::before{content:"✓";position:absolute;left:0;top:0;font-weight:900;color:#4f554f}.source-links{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 8px}.source-links>a{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);font-size:12px;font-weight:750;text-decoration:none!important}.source-links-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.source-links-grid>a{display:flex;flex-direction:column;align-items:flex-start}.source-links-grid a span{font-weight:450;color:var(--muted);line-height:1.35}.defect-split{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:26px 0}.defect-split>div{border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:24px}.defect-split h3{margin:7px 0 10px!important;font-size:24px!important}.diagnostic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0 26px}.mini-card{border:1px solid var(--line);border-radius:10px;padding:18px;background:var(--bg);display:flex;flex-direction:column;gap:7px}.mini-card strong{font-size:15px;line-height:1.35}.mini-card span{font-size:14px;line-height:1.5;color:var(--muted)}.diagnostic-table{width:100%;border-collapse:collapse;margin:20px 0 28px}.diagnostic-table th,.diagnostic-table td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:13px 12px;font-size:14px;line-height:1.45}.diagnostic-table th{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#747974;background:var(--bg)}.decision-list{counter-reset:diag;list-style:none;padding-left:0!important}.decision-list li{counter-increment:diag;position:relative;padding:16px 18px 16px 54px;border-top:1px solid var(--line);margin:0!important}.decision-list li::before{content:counter(diag,decimal-leading-zero);position:absolute;left:8px;top:16px;font-size:11px;font-weight:900;color:#8a8f8a}.decision-list li:last-child{border-bottom:1px solid var(--line)}
@media(max-width:720px){.defect-split,.diagnostic-grid,.source-links-grid{grid-template-columns:1fr}.diagnostic-table{display:block;overflow-x:auto;white-space:normal}.defect-split>div{padding:20px}}

/* Homepage process video */
.hero-side{display:flex;flex-direction:column;gap:28px;align-self:start}.hero-video{overflow:hidden;border-radius:14px;border:1px solid var(--line);background:#111;box-shadow:0 14px 34px rgba(0,0,0,.08)}.hero-video video{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:#111}.hero-side .mission{margin-top:0}.hero-grid{grid-template-columns:minmax(0,1.2fr) minmax(360px,.8fr);align-items:start}
@media(max-width:1050px){.hero-side{max-width:760px}.hero-video{max-width:640px}.hero-grid{grid-template-columns:1fr}.hero-side .mission{max-width:640px}}
@media(max-width:720px){.hero-side{gap:22px}.hero-video{border-radius:10px}.hero-video video{aspect-ratio:4/3}}

/* Technology cards are navigation themselves; do not add a visible "справка" marker. */
a.panel-nav.context-link.context-link-marked::after,
a.route-item.context-link.context-link-marked::after{content:none}